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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Druckformat: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2013005390
pages 293-298

LASER IGNITION PROPERTIES OF COMPOSITE NANOMETRIC ENERGETIC MATERIALS

Shawn C. Stacy
Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas, USA
Michelle L. Pantoya
Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409 USA

ABSTRAKT

Laser ignition delay experiments were conducted in order to better understand the effects of thermal and chemical properties on ignition mechanisms for energetic materials. A Nd:YAG laser (10 ms, ~2 J, 3-mm beam diameter, 1064-nm wavelength) was used to heat the top surface of a reactive material powder, and ignition delay was calculated as the difference between first light of the laser's flash lamp and the sample. In the compositions tested, nanometric aluminum (Al) was used as the fuel and combined stoichiometrically with an oxidizer [copper oxide (CuO), iodine pentoxide (I2O5), polytetrafluoroethylene (C2F4), molybdenum trioxide (MoO3), tungsten trioxide (WO3), or iron oxide (Fe2O3)]. Results show that ignition delays for asymmetrical heating are strongly affected by thermal properties. A key result is that ignition delay was found to be inversely proportional to the molar heat capacity of the oxidizer.


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